Antegrade bile duct stone removal with double guidewire deployment using a novel double-lumen dilator

Antegrade stone removal via endoscopic ultrasound-guided hepaticogastrostomy (EUS-HGS) has been reported as an alternative technique after failed endoscopic retrograde cholangiopancreatography (ERCP [ 1 ] [ 2 ] [ 3 ]). During antegrade stone removal, the pushing force exerted by the balloon catheter across the papilla into the intestine is important because, compared with transpapillary stone removal, this force may be insufficient. In addition, if the common bile duct is angulated, the pushing force can deviate from the correct axis needed to advance the balloon catheter. To overcome this issue, double guidewire deployment might be helpful because the combined stiffness of the guidewires provides better support. A novel double-lumen dilator (Meissa, Japan Lifeline, Tokyo, Japan) has recently been developed ([ Fig. 1 ]). The device has a 2.3-Fr tip and a maximum diameter of 7.4 Fr. An additional 0.025-inch guidewire can be inserted through a side hole located 2 cm from the tip. We herein describe technical tips for antegrade stone removal using double guidewire deployment with a double-lumen dilator. Fig. 1 The novel double-lumen dilator (Meissa, Japan Lifeline, Tokyo, Japan). A 77-year-old man was admitted to our hospital for the treatment of a common bile duct stone. He had previously undergone distal gastrectomy with Roux-en Y reconstruction for distal gastric cancer. Because enteroscopic-guided ERCP was unsuccessful, EUS-HGS was performed using a metal stent, with antegrade stone removal attempted 10 days later. First, an ERCP catheter was inserted into the common bile duct through the mesh of the EUS-HGS stent, and a 0.025-inch guidewire was deployed across the papilla ([ Fig. 2 ]). After removal of the metal stent using a forceps biopsy device through the working channel of the endoscope, the double-lumen dilator was inserted to dilate the papilla ([ Fig. 3 ]). Subsequently, an additional 0.025-inch guidewire was deployed through the side hole of the dilator ([ Fig. 4 ]). The pushing force is effectively transmitted owing to the increased stiffness provided by the double guidewires, and the common bile duct is straightened by double guidewires, and dilator was removed. And then, antegrade stone extraction using a balloon catheter was then easily and successfully performed ([ Fig. 5 ], [ Video 1 ]). Finally, a plastic stent was placed without any adverse events. Fig. 2 Guidewire deployment is attempted across the papilla. Fig. 3 The ampulla of Vater is dilated using the novel double-lumen dilator. Fig. 4 Additional guidewire deployment is performed. Fig. 5 Stone extraction is easily performed using the double guidewire technique. Download Video Antegrade stone extraction is performed under the double guidewire technique using the novel double-lumen dilator.Video 1 In conclusion, this novel dilator facilitates both the double guidewire technique and dilation of the papilla. Endoscopy_UCTN_Code_CCL_1AF_2AF_3AB Endoscopy_UCTN_Code_TTT_1AR_2AH Endoscopy_UCTN_Code_TTT_1AS_2AH Publication History Article published online: 05 February 2026 © 2026. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/). Georg Thieme Verlag KG Oswald-Hesse-Straße 50, 70469 Stuttgart, Germany